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JATOBA (Hymenaea parvifolia)
Nome comercial
Jatoba
Nome científico (autor)
Hymenaea parvifolia Huber
Família
LEGUMINOSAE
Nomes comuns
Azucar Huayo (Peru); Jatobá Amarelo (Brazil); Jutaí-Grande (Brazil); Jutaí (Brazil); Jatobá (Brazil)
DESCRIÇÃO DA ÁRVORE
Descrição botânica
The commercial lengths are reported to average 12 m, with an average diameter of 75 cm. The logs are reported to be straight and cylindrical.
Habitat natural
Hymenaea parvifolia prefers well drained soils in dry forests, up to 400 m of altitude. It less frequently found in humid forests. In Brazil it is reported to be common on high and medium fertile soils in the formations known as cerrados.
Distribuição natural
It is found in the uplands of the Amazon basin.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Wood diffuse porous. Vessels solitary and in short radial multiples. Tangential diameter of vessel lumina 200 micras or more (large). Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. I Axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma lozenge-aliform. Occasionally axial parenchyma confluent. Prismatic crystals in non-chambered axial parenchyma cells. Prismatic crystals in chambered axial parenchyma cells and/or i Occasionally larger rays more than 4 seriate. Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Fibers with simple to minutely bordered pits.
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Odor ou Cheiro
Odor or taste are absent.
Cor
The heartwood and sapwood are distinct. The heartwood is reddish-brown and the sapwood very pale brown with darker lines.
Indice de cor
4
Grã
The grain is usually irregular.
Veios ou desenhos na superfície
The wood is typically medium in texture.
Brilho
The wood is described as moderate in luster.
Indice de durabilidade natural
3
Tratamento preservativo
This species is reported to be impermeable.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.90
Densidade seca ao ar 12% (g/cm³)
1.05
Contração Tangencial Total (Saturado até peso seco) (%)
9.7
Contração Radial Total (Saturado até peso seco) (%)
3.7
Programa de secagem recomendável
BR-A
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
2.6
Programa de secagem detalhado
http://www.tropicaltimber.info/wp-content/uploads/2015/08/KD_Brazilian1.pdf
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
1732
Flexão Estática a 12% (Módulo de elasticidade) (kgf/cm²)
173000
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
966
Resistência a compressão perpendicular as fibras a 12% (kgf/cm²)
192
Cisalhamento radial a 12% (kgf/cm²)
236
Dureza Janka a 12% (perpendicular) (kgf)
1671
Dureza Janka a 12% (paralela) (kgf)
1720
TRABALHABILIDADE
Desdobro da tora em torno para lâminas
It is interesting for slicing, thermal pretreatments are recommended.
Desdobro da tora em faqueadeira para lâminas
It is interesting for slicing, thermal pretreatments are recommended.
Aplainamento
Planing is reported to be fair, with risks of torn grain.
Torneamento
30
Furação
Boring operations are reported to be fair, good surface finishing.
Comportamento na aplicação de pregos
It has a good holding of nails, but pre-boring is necessary.
Colagem
It has a good behavior in gluing.
Lixamento
Sanding is fair, but with good finishing, risk of fuzzy surfaces
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
HOUSING GENERAL, panelling, TURNING, cutlery, TOOLS, tool handles, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, handicrafts
CASAS
- 10 - Silica in Timbers
Painéis
- 18 - W3TROPICOS Missouri Botanical Garden
Torneamento
- 30 - Embassy of Honduras in Japan
Cabo de faca
- 33 - Embassy of Gabon in Japan
FERRAMENTAS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Mangos herramientas
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
CONSTRUÇÃO NAVAL
- 55 - Tropical Timber Atlas of Latin America
Barcos
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Artesanato
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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